The dividing mark between the inflow and outflow tracts of the right ventricle is the supraventricular ridge, a bow-shaped muscular bulge within the right ventricle. The right ventricle is one of the four chambers of the heart and is located anteriorly and inferiorly to the right atrium. The supraventricular ridge is a bow-shaped muscular elevation within the right ventricle that divides the right ventricle into a posterior inferior right ventricular inflow tract and an anterior superior outflow tract. The right ventricular inflow tract has an inlet to the right atrioventricular orifice and receives blood flow from the right atrium, and unidirectional flow of blood between the two is controlled by the tricuspid valve complex, which consists of the tricuspid annulus, tricuspid valve, tendon cords, and papillary muscles. The right ventricular outflow tract, also called the arterial cone or funnel section, is cone shaped and lends its upper end to the pulmonary artery through the pulmonary artery orifice, which has a pulmonary valve structure that controls the unidirectional flow of blood from the right ventricle to the pulmonary artery.